Locomotive-boiler furnace.



N0. 851,329. PATENTED APR. 23, 1907.

I E. HA WADE L J. L. NIGHLSON. LOCOMOTIVE BOILER PURNACIEL APPLlGATIoN FILED APH.. 19, 190s.

3 SHEETS-SHEET 1.

PATENTBD APR. 23, 1907. NICHOLSON.

APPLIOATIOH FILED APR. 1o. 190e.

VMCG

E. H. WADE L9: J'. L.

LOGOMGTIVB BUILER FURNAGB.

No. 851,329. PATENTED APR. 23, 1907. E. H. WADE a E. L. NICHOLSON. LUGOMOTIVB BOILER FURNAGB..

APPLICATION FILED APR.19.1906.

3 SHEETS-SHEET 3.

UNITED STATES EVAN H. WADE AND J OIIN L. NICHOLSON, OF

CHICAGO, IIILINoIs, AssIGNoRs TO AMERICAN LOOOMOIIVF, EQUIPMENT COMPANY.

LOCOIVIOTIVEHSOIMR FURNAGE..

Specification of Letters Patent.

Patented April 23, 1907.

Application filed April 19, 1906. Serial No. 312,635.

To alt 'carlton/z. mfr/y concern:

Be itknown that we, Evita Il. More and Jona' L. i`\lrciioi.so.v, citizens of the United States, and residents ol'Chicago, (look county, Illinois, have invented certain new and uscful Improvements in Locomotive-Boiler Furnaces, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to malte and use the same.

Our invention relates to imprm'ements in locomotive furnaces and has special reference to improvements upon the locomotive boiler furnaces which are shown and dcscribed in our pending applications, tiled Sept. 13, 1904,. serial numbers 224,305 and 224,306. The novel furnaces forming the subject-matter of said applications are characterizet'l by front and back arches composed of refractory bricks, and number of air channels adapted to convey air to the inner ends of the arches, and to there discharge the same downwardly in converging streams. 'lhe lower ends ofk the front arches of these furnaces abut the front wall ofthe furnace in each case and the ducts therein are supplied with air through short tubes which extend through the front water leg at the rbi-oat of tlaboiler. The present invention. is roncerned with the shape or formation ci" the lower bricks of said front arches. We `find many locomotive boilers wherein, by reason of the location of the arch tubes, or other reasons, it is impossible to arrange the air entrance tubes in line with the channels or ducts in our arches. In such locomotives we are unable to use arches having lower end bricks or sections of the kind shown in our pending applications, and the object of this invention is to so improve upon our previous inventions as to enable the use. thereof upon engines of all classes.

A special object of this invention is to improve the form and construction of the lower wl bricks of the arch and adaptfthe same lor use with air supply tubi-s that are arranged in and near the sides of the furnace.

Our invention consists generally in a locomotive boiler furnace, in combination with a refractory arch having its lower end in abutment with the flue sheet of the furnace, said arch being composed of a lplurality of bricks containing coinmunii'zating longitudinal passages or ducts, the lower end bricks of the each containing a,

I arch having their ducts extended laterally to points in or near the sides of the furnace, and ,i air tubes provided in the walls of the furnace I and communicating with the ducts in said l lower end bricks.

Our invention will be more readily understood by reference to .the accom anying drawings, forming a part of this speci ication, and in which Figure I is a vertical longitudinal section ol' a locomotive furnace embodying our in vention Fig. 2 is a horizontal section viewed from beneath, one-half of this View being on the line -av of Fig. l, and the other half on the line g/-/ r/ of Fig. 1. Fig. 3 is a transverse vertical section on the line z-z of Fig. l; Fig. 4 is a longitudinal vertical section, illustrating an arch of'a different type, the section being on the line ein of Fig. 5; Fig. 5.is a compound. horizontal section of the st'ructureof Fig. 4, similar in character to Fig. l2,' & Fig. 6 is a transverse section on the line Referring to Figs. 1 to 3 of the drawings,

it will be' noted that the furnace is of ari ordinary locomotive type. Therear end of l the furnace contains a short hollow arch,- A,

and the front a longer arch, B. The latter is composed of two series of bricks arched against each other and on the side walls of the furnace. ',Sce Figs. 1 and 3. 'lhe middle ofthe arch' is com osed of a number of bricks, B, of uniforms ape, and together containing a plurality of straight longitudinal ducts, C. The'u per' end bricks, B2, have cavities, C', and de ecting surfaces, B3, for discharging air rtoward the furnace grate. The lower end bricks, D-D, are of still different shape and as these comprise the distinctive feature of the present invention, the will be described in detail. The lower hriclis abut against the lower l part of the furnace flue sheet, 3. They take i their forni from the plane, B, of thelower l most bricks, B', and the plane or surface of the flue sheet, 3. In the op osite cross-sction-that is, transversely o the furnacethe bricks, I), correspond to the up er bricks` of the arch. The ducts, O2, in the ricks, D.' are arranged at such angle that the outer duct, O2', opens t rough the outer end ofthe brick, and the inner and larger duct, O2, opens through the bottom side of the brick, l B, at the corner of the furnace. We prefer supported by lugs, 2,

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that the larger lduct shall communicate with the two inner ducts, C of the abutting brick, B', while the duct C2 is intended t supply only the outer channel or duct, C. The air is admitted to the duct throu h tubes, 4 andA 5, extendin throu h the ont and side water legs o the boi er at points adjacent to the corner of the furnace. At such point, a tube, 4, may be arranged in the front water leg without interference with the c lindrical art of the boiler. The lower si e of the rick, D, may be provided with notches, or cinder holes, D', if desired.

The front arch shown in Figs. 4 to 6' of the d-rawings and which is supported by arch tubes, 6, requires lower bricks offdiiferent form though possessin the same characteristics asthosea ove describe The arch shown in these fi ures has its lower end' formed of two bricks, -l-E, while its uper part comprises three rows or series of bric s,

F & G, the latter having the form of keystones as shown in Fig. 6. The bricks, F, F & G contain air channels,- F and G', Vwhich are served with air through an ular or diagonal ducts, E', E, in the bric s EE. The

' ducts, E-'-E, are of irregular formation as required to communicate with the ducts, F and G, which are of varying elevations, as indicated. -As before, the air tubes, 4!l and 5', Iare arranged at the corners of the furnace, such location being most convenient in boilers of the type shown and such arrangement being made ossible by the lateral ducts in the 'lower end arch brace.

Having thus described our invention, we

claim as new and desire to secure by Letters Patent: v

1. A locomotive boiler furnace, in combination with a front arch occupying an inclined position in the furnace and having its lower end abutting the flue -sheet of said furnace 'and the up er part of said arch comprising eneral i Witnesses:

3. 'A locomotive boiler furnace, in combi-h,

taining two angularly or diagonally posi tioned ducts communicating with the atmosphere, and the. ducts inthe upper 'part of the arch, substantially as described.

4. A locomotive boile furnace containing laterally and longitudinally positioned air. admission tubes near its forward corners, in combination with a -front arch comprising a plurality of longitudinally channeled refractory bricks, and two lower end bricks containing lateral orV transverse channels or ducts communicatin'gI with respective tubes, substantially as'described. A A 5. A hollow front arch for locomotive furnaces vcomprising-lower end bricks in endwise abutment and containing lateral ducts opening through their ends and lower sides, and a 'plurality of channeled bricks .superimposed upon said lower end bricks, substantially as described.

6. A hollow front arch for locomotive furnaces comprising lower end bricks in endwise abutment and containing lateral ducts opening through their ends and lower sides, a pluralityfof bricks in sidewise abutment superimposed'upon said end bricks, said superimposed bricks containing a plurality of longitudinal ducts, certain pairs of which communicate with single' ducts in said lower end bricks, substantiallyas described. A

- 7. A hollow front arch for locomotive fur-- naces adapted to besupported on arch tubes, and comprising threerows or series of channeled refractory bricks in respective endwise abutment, in combination-with two lower end bric-ks in endwiseabutment, and containing late'ral'ducts or channels communicating with the channels of the other bricks, substantially as described.

- 'In testimony whereof, I have hereunto set my hand, thi-s 22nd day of March, 1906, in

'the presence of two subscribing witnesses.

EvAN r1.

CHARLES GILBERT HAWLEY, M. SIMON.

' l In testimony whereof, I have hereunto setv my hand, this 27 'day of March, 1906,- in the' presence of two subscribing witnesses.

. JOllN L.' NICHOLSON.

Witnesses;

E. L. Hamelin.

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